Data from: Living on the edge: exploring the role of coastal refugia in the Alexander Archipelago of Alaska

• Main Authors: Sawyer, Yadeeh E., MacDonald, S.O., Lessa, Enrique P., Cook, Joseph A., Sawyer, Yadeeh
• Format: Dataset
• Language: unknown
• Published: Data Archiving and Networked Services (DANS) 2019
• Subjects: Life sciences; medicine and health care; Microtus longicaudus; Sorex monticola; islands; Coastal Refugia Hypothesis; endemism; small mammals; Peromyscus keeni; comparative phylogeography; envir; archeo; Fairbanks; Pacific; Archipelago; Alaska
• Online Access: https://doi.org/10.5061/dryad.867g4c8

Although islands are of long-standing interest to biologists, only a handful of studies have investigated the role of climatic history in shaping evolutionary diversification in high latitude archipelagos. In this study of the Alexander Archipelago (AA) of Southeast Alaska, we address the impact of glacial cycles on geographic genetic structure for three mammals co-distributed along the North Pacific Coast. We examined variation in mitochondrial and nuclear loci for long-tailed voles (Microtus longicaudus), northwestern deermice (Peromyscus keeni), and dusky shrews (Sorex monticola), and then tested hypotheses derived from Species Distribution Models, reconstructions of paleo-shorelines, and island area and isolation. In all three species, we identified paleoendemic clades that likely originated in coastal refugia, a finding consistent with other paleoendemic lineages identified in the region such as ermine. Although there is spatial concordance at the regional level for endemism, finer scale spatial and temporal patterns are less clearly defined. Demographic expansion across the region for these distinctive clades is also evident and highlights the dynamic history of Late Quaternary contraction and expansion that characterizes high latitude species. Appx I & IXAppendix I - Specimens examined. Museum number acronyms are MSB= Museum of Southwestern Biology, UAM=University of Alaska Museum of the North, Fairbanks, HG= Gwaii Haanas National Park Reserve and Haida Heritage Site, and UWBM=University of Washington Burke Museum. GenBank numbers correspond to cyt b, and each phased allele for M. longicaudus (ETS2, FGB and Rag1), Peromyscus (FGB, IRBP and Zp3) and S. monticola (ADH2, ApoB and FGB) respectively, –= not applicable. GenBank in bold were obtained from other studies. Appendix IX - Between group net genetic divergences of cyt b among refugial and non-refugial Southeast Alaskan populations lineages of M. longicaudus, P. keeni and S. monticola. The number of base differences per site from estimation of net ...